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甲烷CH4:()
A、主要成分Main components。无色,稍有蒜味。Colorless, slightly garlicky
B、比空气轻,在标准压力(101.325kPa)和15℃下,1Nm3甲烷重0.6785kg。Lighter than air, 1Nm3 methane weighs 0.6785kg at standard pressure (101.325kPa) and 15℃
C、具有高的热稳定性和很高的热值(33904~37668kJ/m3)。It has high thermal stability and high calorific value (33904 ~ 37668kJ/m3).
D、以上都不对